A2M fair value based on fundamentals

Looking for opinions on what is a fair value, Warren Buffet style, on the value of A2M (per share)

Here are some basic calculations I did, feel free to tell me I'm way off, using some evidence would be good in this regard

Half year net profit after tax = 10.1 mill AUD
Full year estimate = 25 mill (doubled the half year plus some)

25 mill * price to earning of 15 = 375 mill market cap (MC), 20 = 500 mill MC, 30 = 750 mill MC, 40 = 1000 mill MC

thus at 660,000 shares oustanding

Share price PE of
15 = $0.57,
20 = $0.76,
30 = $1.14,
40 = $1.52

Based on these calculations with A2m's growth potential $0.60 per share is getting dirt cheap (PE of 15 is the long term average of the stock market apparently, but based on A2M's growth potential I think it is a little low especially as it is in its growth phase), but above $1.00 its starting to look a bit expensive, even with the growth potential

Are the calculations solid or did I miss something?

I invested in A2M closer to $2 then sold out (took a punt, based on the hype), now I want to stop being a dxxk and actually understand investing and how to value things.

If I had done this calculation before I put my money in, then I wouldnt have